<form action='<?php echo site_url("/account/login_post")?>' method="post" accept-charset="utf-8">
   <fieldset>
      <label>
         <span class="block input-icon input-icon-right">
         <input name="Username" type="text" class="span12" placeholder="Username" />
         <i class="icon-user"></i>
         </span>
      </label>
      <label>
         <span class="block input-icon input-icon-right">
         <input name="Password" type="password" class="span12" placeholder="Password" />
         <i class="icon-lock"></i>
         </span>
      </label>
      <div class="space"></div>
      <div class="clearfix">
         <label class="inline">
            <input type="checkbox" />
            <span class="lbl"> Remember Me</span>
         </label>
         <!--
         <button onclick="return false;" class="width-35 pull-right btn btn-small btn-primary">
         -->
         <button type="submit" class="width-35 pull-right btn btn-small btn-primary">
            <i class="icon-key"></i>
            Login
         </button>
      </div>
      <div class="space-4"></div>
   </fieldset>
</form>